+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   78680 (2002 TR131) Classification: Main-belt Asteroid          SPK-ID: 2078680 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 27 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1040686575603177 4.6044e-08   a 3.107204018393495 2.6582e-08 au q 2.78384146743326 1.476e-07 au i 9.258091688712051 5.9843e-06 deg node 343.0272863757624 2.9794e-05 deg peri 73.9202195724715 4.3246e-05 deg M 42.25896683158376 2.8861e-05 deg tp 2458765.661414453692 (2019-Oct-09.16141445) 0.00016023 TDB period 2000.566912428282 5.48 2.5672e-05 7.029e-08 d yr n .1799489923398928 2.3092e-09 deg/d Q 3.430566569353731 2.9349e-08 au   Orbit Determination Parameters    # obs. used (total)      745      data-arc span      10366 days (28.38 yr)      first obs. used      1991-10-04      last obs. used      2020-02-20      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51483      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 21:25:58   Additional Information  Earth MOID = 1.81322 au   Jupiter MOID = 1.93333 au   T_jup = 3.192  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.7   n/a MPO337848   diameter diameter 4.648 km 1.350 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.142   0.054 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   78680 (2002 TR131)          Discovered 2002-Oct-04 by LINEAR at Socorro Reference: 20040415/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  2002 TR131 = 1991 TP4  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-23 18:01 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin